CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash	$ 3,939	$ 8,203
Short term investment (certificate of deposit)	1,017	1,005
Accounts receivable, net of allowance of $10 and $10, respectively	4,142	5,945
Costs and estimated earnings in excess of billings on uncompleted contracts	925	1,077
Prepaid expenses and other current assets	302	864
Total current assets	10,325	17,094
Property, plant and equipment, net	12,352	7,938
Intangibles, net	63	69
Long-term asset - Carousel	0	3,117
Other assets	1,230	211
Total assets	23,970	28,429
Current liabilities:
Accounts payable and accrued liabilities	1,511	1,778
Billings in excess of costs and estimated earnings on uncompleted contracts	612	3,349
Total current liabilities	2,123	5,127
Total liabilities	2,123	5,127
Commitments and contingencies (Note 10)
Stockholders' equity:
Preferred stock, $0.001 par value, 10,000 shares authorized, 0 shares issued and outstanding	0	0
Common stock, $0.001 par value, 24,500,000 shares authorized, 15,438,660 and 15,408,660 shares issued, respectively	15	15
Treasury stock, 2,002,417 and 587,847 shares at cost	(2,040)	(567)
Additional paid-in capital	73,246	73,112
Accumulated deficit	(49,374)	(49,258)
Total stockholders' equity	21,847	23,302
Total liabilities and stockholders' equity	$ 23,970	$ 28,429